Erro em Código Java

package utilitarios;

import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.PopupMenu;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class JCelular {

    public static void main(String[] args) {
        JFrame janela = new JFrame("Celular"); // janela
        final JLabel visor = new JLabel("5122299"); // visor
        visor.setHorizontalAlignment(JLabel.RIGHT);
        JPanel numeros = new JPanel(new GridLayout(4, 3));//Tecla
        String[] nomes = {"1", "2", "3", "4", "5", "6", "7", "8", "9", "", "0", "#"};
        // Cria o listener para as teclas do celular
        ActionListener trataTecla = (ActionEvent e) -> {
            JButton botaoClicado = (JButton) e.getSource();
            visor.setText(visor.getText() + botaoClicado.getText());
        };
        for (int i = 0; i < nomes.length; i++) {
            ((JButton) numeros.add(new JButton(nomes[i]))).addActionListener(trataTecla);
        }

        JPanel botoes = new JPanel(); // Botoes send e end

        ///////////////////////////// NOVO "SEND" //////////////////////////////////////
        ((JButton) botoes.add(new JButton("send"))).addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                System.out.println(visor.getText());
            }
        });

        ///////////////////////////// ANTIGO "SEND" //////////////////////////////////////
//        ((JButton) botoes.add(newJButton("send")).addActionListener(new ActionListener() {
//            @Override
//            public void actionPerformed(ActionEvent e) {
//                System.out.println(visor.getText());
//            }
//        }));
        ((JButton) botoes.add(new JButton("end"))).addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                visor.setText(" ");
            }
        });
        // monta tudo
        janela.getContentPane().add(visor, BorderLayout.NORTH);
        janela.getContentPane().add(numeros, BorderLayout.CENTER);
        janela.getContentPane().add(botoes, BorderLayout.SOUTH);
        // mostra
        janela.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        janela.pack();
        janela.show();
    }

    private static PopupMenu newJButton(String send) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }
}

((JButton) botoes.add(newJButton("send")).addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            System.out.println(visor.getText());
        }
    }));

((JButton) botoes.add(new JButton("send"))).addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            System.out.println(visor.getText());
        }
    });